Guitar



FIG. 1 is a top perspective view of a guitar, showing my new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a right-side elevational view thereof;

FIG. 6 is a rear elevational view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a left-side elevational view thereof.

The broken lines showing a headstock and neck in the figures depict environmental matter and form no part of the claimed design. 

I claim the ornamental design for a guitar, as shown and described. 